When Fuuka hit her second year of middle school, puberty kicked in. Now she's really tall and has huge boobs. Due to her hairstyle, her classmates call her "Saipu," after the cyclops. Her affection for her older brother was cute when she was a little girl and said she wanted to marry him. Now it just freaks him out, since she's decided she's adult enough to follow through on her childish promises. This 4-koma style manga is the story of the life of this cyclops girl!

Most of the jokes are around how big the sister is, the brother is short, the sister liking her brother, the classmates liking the sister, or over some vanilla echi thing. Not terrible, but nothing I could see on anyone's favorites list.

The author straddled the fence on this one. Why make the girl a sister that comes onto the MC if there is no possibility of romance? She should have just been a childhood friend or something. Would have made no difference in this plotless 4-koma.